[PATCH 9/9] drm/i915: Double the port clock when using double clocked modes with 12bpc

From: ville.syrjala@linux.intel.com
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 9/9] drm/i915: Double the port clock when using double clocked modes with 12bpc
Date: Tue,  5 May 2015 17:06:27 +0300	[thread overview]
Message-ID: <1430834787-10255-10-git-send-email-ville.syrjala@linux.intel.com> (raw)
In-Reply-To: <1430834787-10255-1-git-send-email-ville.syrjala@linux.intel.com>

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Currently we're forgetting to double the port clock when using double
clocked modes with 12bpc on HDMI. We're only accounting for the 1.5x
factor due to the 12bpc. So further double the 1.5x port clock when we
have a double clocked mode.

Unfortunately I don't have any displays that support both 12bpc and
double clocked modes, so I was unable to test this.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 1810242..f3eec38 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1248,6 +1248,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
 
 	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) {
 		pipe_config->pixel_multiplier = 2;
+		clock_12bpc *= 2;
 	}
 
 	if (intel_hdmi->color_range)
-- 
2.0.5

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